57 Ser 5 6 7 8 9 10 w 16 OOO Ib axle 58 59 Ser 5 6 7 8 9 10F w 16 OOO lb axle 60 61 Ser 60 70 w 16 000 Ib axle exc 2 Spd w vacuum shift 60 66 Ser 80 TDM exc 34 000 Ib axle 62 65 Ser 60 w 17 000 Ib axle exc 2 Spd w vacuum shift 66 Ser 60 4 cyc Diesel w 17 000 Ib axle 67 70 Ser 60 TDM w 30 000 Ib axle 3772690 1 25 17V4 0 D x 13 I D Eaton 50364 64 66 Ser 80 w 23 000 Ib axle exc 4 cyc Diesel 68 70 Ser 60 w 23 000 Ib axle 2428129 1 30 020 thk 19 dia Eaton 52820 65 66 Ser 50 w 13 500 lb axle 67 70 Ser 40 w 13 500 lb axle 68 69 Ser 40 w Dual Brakes 3859333 1 32 13 z 0 D x 11 I D 65 66 Ser 60 4 cyc Diesel w 16 000 Ib axle 2347223 1 88 16V 0 D x 13 V I D 66 Ser 50 60 w 2 Spd axle 67 69 Ser 50 60 w 2 Spd axle exc 18 500 lb axle 68 69 Ser 50 60 w Dual Brakes 70 Ser 50 60 w 15 17 000 Ib 2 Spd axle 3874349 1 55 18 O D x 15 M l D 5 510 CASE ASSY ElOLT COVER NUT SUPPORT ASSY WASHER Diff and Planet A Differential Case Case lass internal gears 54 55 2 Ton 1st Ser exc H D 2 Spd 55 56 Ser 6 exc H D 2 Spd 3707515 1 56 80 w cover 54 55 2 Spd w Vac Shift 1st Ser 3707538 1 63 20 cast 3703727 54 55 2 Ton 1st Ser exc H D 2 Spd 55 56 Ser 6 exc H D 2 Spd 3707515 1 56 80 w cover 55 56 Ser 6 w H D 55 59 Ser 5 7 8 TDM SBC exc H D axle 2 Spd 57 59 Ser 6 exc H D 2 Spd 60 65 Ser 60 70 w 15 17 000 Ib axle exc 2 Spd 64 66 Ser 50 w 15 000 Ib axle exc 2 Spd 4 cyc Diesel 65 66 Ser 50 4 cyc Diesel w 15 000 Ib axle exc Tilt 2 Spd 65 66 Ser 60 4 cyc Diesel w 15 000 lb axle exc 2 Spd TDM 65 66 Ser 60 w 15 000 Ib axle exc Diesel 2 Spd 65 66 Ser 60 2 cyc Diesel w 15 000 lb axle exc Tilt TDM 2 Spd 67 68 Ser 50 exc 2 Spd rr axle 67 68 Ser 60 exc TDM 2 Spd rr axle 69 Ser 50 69 Ser 60 exc TDM 70 Ser 50 w Sgl Spd axle 70 Ser 60 w Sgl Spd axle exc TDM 3768273 1 68 40 w cover Note 1 j 1971 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATION P A 31S REV 71 5 201 5 508 5 510